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Definition

noun, plural: trinucleotide repeat disorders

Any of a set of genetic disorders caused by trinucleotide repeats exceeding the stable threshold and expanding in successive generations (thus resulting in a non-Mendelian inheritance pattern).

Supplement

Many of the trinucleotide repeat expansion disorders show neurological or cognitive symptoms. Fragile X syndrome, Huntington disease, myotonic dystrophy, and Machado-Joseph disease are examples of trinucleotide expansion repeat disorders.

Also called:

• trinucleotide repeat disorder
• codon reiteration disorder
• triplet repeat expansion disorder

Mentioned in:

• non-Mendelian inheritance